Refactor Phase 1

[jasoet]

Refactor Phase 1

This refactor aiming to make the proctor code easier to maintain since they're a lot of intertwined code between cli and proctord also a lot of files stored inside redundant directories. The naming convention and code style will be based on Go standard naming conventions and effective go docs.

• Refactor source structure, now is separated into 3 main directories shared, cli, proctord.
• Move all shared code into shared directory
• All code that only used for cli or proctord moved to a certain directory.
• All test is green
• No logic changes
• Most of the changes are for moving the file, changing the import targets and changes the import alias.

Phase 2 plan

• Refactor proctord code to follow Hexagonal Architecture.

@bimozx @giosakti

[olttwa]

Closing this PR as discussed with @jasoet